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Technical '47 Ford - SBC 327 to Early Ford Transmission - Help Wanted

Discussion in 'The Hokey Ass Message Board' started by axle, May 13, 2021.

  1. F-ONE
    Joined: Mar 27, 2008
    Posts: 2,830

    F-ONE
    Member
    from Alabama

    I wonder if it's an old racing application for a special flywheel?
    Where there other makes and Models that used the round "early Ford" style bolt pattern?
     
  2. Eddie
    Joined: Apr 2, 2006
    Posts: 520

    Eddie
    Member
    from Georgia

    Although it seems like overkill for an early Ford transmission, possibly for a dual disc setup. Possibly some early rail dragsters that used high gear only?
     
  3. AngleDrive
    Joined: Mar 9, 2006
    Posts: 973

    AngleDrive
    ALLIANCE MEMBER
    from Florida

    Possibly an early in and out box application for sprint car.
     
  4. Tickety Boo
    Joined: Feb 2, 2015
    Posts: 1,374

    Tickety Boo
    Member
    from Wisconsin

    Maybe used a Chevy heavy truck flywheel, are some thicker for big trucks?
     
  5. manyolcars
    Joined: Mar 30, 2001
    Posts: 8,503

    manyolcars

    I measured my adapter for 49-53. It looks like 3 3/4 from mating surfaces
     
    axle likes this.
  6. axle
    Joined: Mar 3, 2001
    Posts: 3,892

    axle
    Member
    from Drag City


    Thanks so much.
     
  7. axle
    Joined: Mar 3, 2001
    Posts: 3,892

    axle
    Member
    from Drag City


    Damn. Okay guys, I'm looking for a 3 3/8 adapter. :-(
     
    Moriarity likes this.
  8. Marty Strode
    Joined: Apr 28, 2011
    Posts: 6,003

    Marty Strode
    Member

    Another fix might be a throwout bearing extension like we used in our Dragster. Early on, clutch cans (bellhousings) were 7-1/2" deep and housed a 2 disc clutch, and later the can depth increased to 8-1/8" to make room for a 3 disc clutch. Both applications utilized a standard early Ford throwout bearing. When running a 2 disc setup in the deep can, it required an extension, sold by clutch manufacturers. I don't remember the brand name we used. I would bet McLeod could help you out. That would take up 5/8", might be enough.
     
    alanp561, Johnny Gee and joel like this.
  9. AngleDrive
    Joined: Mar 9, 2006
    Posts: 973

    AngleDrive
    ALLIANCE MEMBER
    from Florida

  10. AngleDrive
    Joined: Mar 9, 2006
    Posts: 973

    AngleDrive
    ALLIANCE MEMBER
    from Florida

    There is one on ebay for 400.00 polished. Too much $$$. Fair price is $200.00
     
    axle likes this.
  11. AngleDrive
    Joined: Mar 9, 2006
    Posts: 973

    AngleDrive
    ALLIANCE MEMBER
    from Florida

  12. lake_harley
    Joined: Jun 4, 2017
    Posts: 1,498

    lake_harley
    Member

    axle...PM sent

    Lynn
     
  13. anthony myrick
    Joined: Sep 4, 2009
    Posts: 8,308

    anthony myrick
    Member

    This set up came up on marketplace
    Has a good pic of the pressure plate.
    93B92294-D6E4-44E5-BDF2-3004BC90CA99.jpeg
     
    kidcampbell71 likes this.
  14. axle
    Joined: Mar 3, 2001
    Posts: 3,892

    axle
    Member
    from Drag City

    Got it
     
  15. axle
    Joined: Mar 3, 2001
    Posts: 3,892

    axle
    Member
    from Drag City


    Thanks very much. Couldn't find the post. Without that depth measurement of the adapter, it doesn't help me out.
     
  16. axle
    Joined: Mar 3, 2001
    Posts: 3,892

    axle
    Member
    from Drag City

    UPDATE: Believe it or not, the saga continues. It turns out that my Aluminum Offy adapter is approx. 3 1/2 inches. Thinking it was too wide, I bought a Wilcap adapter that is the same exact measurement. Bolting everything together, the clutch pedal fully engaged, the original throwout bearing barely touches the Pressure Plate.

    To reiterate what I have: 1967 Chevy 327. Offy or Wilcap adapter, Chevy cast iron flywheel, early Ford 10" clutch, and a 1950 Mercury Pressure Plate. I am literally racking my brain on this, and don't know what to do at this point. This set up has probably been done a thousand times.

    1. Can the 3 fingers of the Pressure Plate be adjusted a 1/2". ?

    2. Are you guys sure there isn't some other throwout bearing that will compensate for the extra needed 1/2 inch?

    Any comments, suggestiong are greatly appreciated, Axle
     
    Last edited: Jun 17, 2021
  17. anthony myrick
    Joined: Sep 4, 2009
    Posts: 8,308

    anthony myrick
    Member

    Just tossing this out there. A throw out bearing for a 3 finger pressure plate is usually shorter than one for a diaphragm pressure plate.
    Don’t know if you can swap the two.
    The diaphragm throw outs are usually shaped different.
     
  18. Moriarity
    Joined: Apr 11, 2001
    Posts: 21,583

    Moriarity
    SUPER MODERATOR
    Staff Member

    @axle does your pressure plate have fingers like this? The one in my 40 does and I believe mine is 11" but my car has a Cadillac

    clutchfingers.jpg
     
    kidcampbell71 likes this.
  19. Warmer 1932
    Joined: Mar 2, 2018
    Posts: 518

    Warmer 1932

    Ok I have done this many times. With the alum adapter of course u need the chevy 3 hole starter with the correct flywheel. Then Use a 9 inch pressure plate and disc (ford) then have the pressure plate drilled and tapped for the nine inch. After that have it balanced. Speedway motors sells the correct pilot bearing for the end of the crankshaft it’s longer. Use stock throw out bearing. That’s it. Don
     
  20. hemihotrod66
    Joined: May 5, 2019
    Posts: 419

    hemihotrod66
    Member

    Maybe you need a longer clutch adjustment rod....That would put the throwout bearing closer to the pressure plate...
     
  21. axle
    Joined: Mar 3, 2001
    Posts: 3,892

    axle
    Member
    from Drag City


    Thanks for your response. This is what I have.

    thumbnail-2.jpg thumbnail-3.jpg thumbnail-4.jpg
     
    Nailhead Jason likes this.
  22. My 39 came with an adapter from an unknown manufacturer that uses the a GM cast iron power glide adapter, and an aluminum adapter that bolts to the early for trans. Inside it had a 50 merc pressure plate and a 10 inch clutch disk. I replaced all of it with a pressure plate and clutch disk from wilcap and an old Wilcap adapter i already had. The pressure plate has the same bolt patern as the chevy so no modifications of the fly wheel are needed. If you need any measurements please let me know, i have the entire working assembly in a box and can measure for you. There should no change in the release bearing and the fork from 32 to 48, baring maybe big trucks, but i think those are the same as well. Let me know if you might want to try the chevy to early ford adapter i have and i can ship it to you.

    Jason
     
  23. axle
    Joined: Mar 3, 2001
    Posts: 3,892

    axle
    Member
    from Drag City


    Thanks Jason, Let me talk to my brother who is assisting with this. It's getting so damn frustrating
     
    Nailhead Jason likes this.
  24. Moriarity
    Joined: Apr 11, 2001
    Posts: 21,583

    Moriarity
    SUPER MODERATOR
    Staff Member

    that pressure plate is the problem. I bought my clutch from the early ford store, they were vending at the LARS swap meet. talk to them, they will have what you need. you need the pressure plate that looks like the one I posted above
     
  25. also when you do get the clutch setup straight, make sure you adjust the linkage, so you have .090 to .100 clearence between the for and the release bearing. its crazy how much this stuff expands when it gets hot and the fingers of the clutch move out a bit when at higher RPM. to tight and the release bearing will start making contact and be completely shot in a short amount of time.
     
    axle likes this.
  26. nosford
    Joined: Feb 7, 2011
    Posts: 500

    nosford
    Member

    Hi everybody, I am no expert but the picture Axle posted looks like the clutch disc hub is not fitting up inside the pressure plate and the clutch fingers are down (pressure plate is released). It's almost as if the disc is too big to fit inside the pressure plate or upside down? Picture doesn't look right to me like the hub with the springs should fit inside the opening in the pressure plate, not be trapped underneath. Hard to explain what I mean....
     
  27. @Moriarity is probably right. That basic pressure plate was used in several diffent makes, Its the same diameter, bolt pattern and basic frame for 50 Mercs and some Desotos, Studebaker, and i think a Buick with a straight 8. The difference is in the finger height. I have one that looks just like yours in my 39 now, but have also done it with ones like @Moriarity posted.
     
    Moriarity likes this.
  28. That is called a "LONG" brand pressure plate.
     
  29. anthony myrick
    Joined: Sep 4, 2009
    Posts: 8,308

    anthony myrick
    Member

    6D060870-1550-4C62-8E16-20897E27C1D9.jpeg EA5AB221-31C5-4A35-BFF9-59810953DF8A.jpeg
    Is this (one of em) the style needed?
    The one the OP shown looks more like a 51 merc PP.
     
  30. Eddie
    Joined: Apr 2, 2006
    Posts: 520

    Eddie
    Member
    from Georgia

    Yes, it does appear that way! Looks as if the disc is not recessed into the pressure plate.
    Eddie
     

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